Visualising a 3d dental restoration on a 2d image

Patent metadata

Field	Value
Publication number	US-2016015246-A1
Application number	US-201414773564-A
Country	US
Kind code	A1
Filing date	Mar 7, 2014
Priority date	Mar 8, 2013
Publication date	Jan 21, 2016
Grant date	—

Abstract

A method for visualizing a 3D dental restoration on a 2D image of the mouth of a patient, the method including obtaining a 3D dental model of at least a part of the patient's oral cavity, designing the 3D dental restoration, obtaining the 2D image of the mouth of the patient, estimating a virtual camera comprising at least one virtual camera property corresponding to at least one physical camera property of the physical camera used to obtain the 2D image, viewing the 3D dental restoration using the virtual camera, determining the visible area of the 3D dental restoration, which is not overlapped by surrounding anatomic features when viewed with the virtual camera, imaging the visible area of the 3D dental restoration with the 2D image. This provides an image which with high accuracy gives the dentist and the patient a visual presentation of the final result of a dental treatment.

First claim

1 . A method for visualising a 3D dental restoration on a 2D image of the mouth of a patient, wherein the method comprises:
obtaining a 3D dental model of at least a part of the patient's oral cavity, designing the 3D dental restoration, obtaining the 2D image of the mouth of the patient, estimating a virtual camera comprising at least one virtual camera property corresponding to at least one physical camera property of the physical camera used to obtain the 2D image, viewing the 3D dental restoration using the virtual camera, determining the visible area of the 3D dental restoration, which is not overlapped by surrounding anatomic features when viewed with the virtual camera, imaging the visible area of the 3D dental restoration with the 2D image.

2 . A method according to claim 1 , wherein the method further comprises:
determining the visible area of the 3D dental restoration with the 3D dental restoration placed in the 3D dental model.

3 . A method according to claim 2 , wherein the virtual camera is estimated by
marking at least a first, second, third and fourth reference point on the 2D image and corresponding at least first, second, third and fourth reference point on the 3D dental model, aligning the at least first second, third and fourth reference point with the respective corresponding at least first second, third and fourth reference point.

4 . A method according to claim 1 , wherein the visible area of the 3D dental restoration is determined by identifying overlapping anatomic features in the 2D image of the mouth and subtracting the overlapping anatomic features from the 3D dental restoration.

5 . A method according to claim 1 , wherein the surrounding anatomic feature is the gingiva, a posterior tooth and/or the lip.

6 . A method according to claim 1 , wherein the at least one physical camera property is the field of view.

7 . A method according to claim 1 , wherein the visible area of the 3D dental restoration is imaged with the 2D image by projecting the visible are of the 3D dental restoration onto the 2D image.

8 . A method according to claim 1 , wherein the visible area of the 3D dental restoration is imaged with the 2D image by generating a mask aligned with the 2D image, said mask having a first value in the areas of the 2D image overlapping the 3D dental restorations and a second value in the areas where no overlap occur.

9 . A method according to claim 8 , wherein the 2D image is transparent in the areas where the mask have the first value.

10 . A method according to claim 1 , wherein the method further comprises adjusting the transparency of the 2D image.

11 . A method according to claim 1 , wherein the method further comprises defining the edge of the lip in the 2D image.

12 . A computer user interface for visualising a 3D dental restoration on a 2D image of the mouth of a patient, wherein the computer user interface comprises:
a tool for loading a 2D image of the mouth of a patient, a tool for providing a 3D dental model of at least a part of the patient's oral cavity, a tool for providing a 3D dental restoration, a tool for estimating a virtual camera comprising at least one virtual camera property corresponding to at least one physical camera property of the physical camera used to obtain the 2D image, a view area for imaging the visible area of the 3D dental restoration, which is not overlapped by surrounding anatomic features when viewed with the virtual camera, with the 2D image.

13 . A computer user interface according to claim 12 , wherein the tool for estimating the virtual camera comprises
marking at least a first, second, third and fourth reference point on the 2D image and corresponding at least first, second, third and fourth reference point on the 3D dental model.

14 . A computer user interface according to claim 12 , wherein the user interface further comprises a tool for adjusting the transparency of the 2D image.

15 . A computer user interface according to claim 12 , wherein the interface further comprises a tool for defining the edge of the lip in the 2D image.

Assignees

• 3Shape As

Inventors

• Clausen Tais
• Fisker Rune

Classifications

• A61C13/0004

  Computer-assisted sizing or machining of dental prostheses · CPC title

• A61B1/24

  for the mouth, i.e. stomatoscopes, e.g. with tongue depressors; Instruments for opening or keeping open the mouth · CPC title

• G16H20/40

  relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture · CPC title

• A61B1/0005

  combining images e.g. side-by-side, superimposed or tiled · CPC title

• A61C13/34

  Making or working of models, e.g. preliminary castings, trial dentures; Dowel pins [4] · CPC title